[STR-2584] struts-examples webapp does not work (NPE at TagUtils.java:1027)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Incomplete
• Affects Version/s: Nightly Build
• Component/s: Example Applications
• Environment: Operating System: Windows XP; Platform: Other
• Bugzilla Id: 36682
• Assignee: Unassigned
• Reporter: Wendy Smoak
• Created: 16/Sep/05 14:42
• Updated: 16/Feb/11 19:47
• Resolved: 23/Apr/06 04:51

Description

To reproduce, build and deploy struts-examples.war, then visit
http://localhost:8080/struts-examples.

See also: http://www.mail-archive.com/dev%40struts.apache.org/msg11843.html

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from
fulfilling this request.

exception

javax.servlet.ServletException
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:192)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1934)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:429)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:95)
org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:55)
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:37)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:189)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1934)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:429)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NullPointerException
org.apache.struts.taglib.TagUtils.pageURL(TagUtils.java:1027)
org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:451)
org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:314)
org.apache.struts.taglib.html.LinkTag.calculateURL(LinkTag.java:463)
org.apache.struts.taglib.html.LinkTag.doStartTag(LinkTag.java:341)
org.apache.jsp.welcome_jsp._jspx_meth_html_link_3(welcome_jsp.java:252)
org.apache.jsp.welcome_jsp._jspService(welcome_jsp.java:96)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:95)
org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:55)
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:37)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:189)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1934)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:429)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache
Tomcat/5.0.30 logs.
Apache Tomcat/5.0.30